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The company then compared its theoretical flight path with data received from Boeing 777s it knew had flown the same route, he said, and it matched exactly. “We then took the data we had from the aircraft and plotted it against the two tracks, and it came out as following the southern track,” Jonathan Sinnatt, head of corporate communications at Inmarsat, said. The Doppler effect is why the sound of a police car siren changes as it approaches and then overtakes an observer. Inmarsat’s scientists then interrogated the faint pings using a technique based on the Doppler effect, which describes how a wave changes frequency relative to the movement of an observer, in this case the satellite, a spokesman said.īritain’s Air Accidents Investigation Branch was also involved in the analysis. The pings, automatically transmitted every hour from the aircraft after the rest of its communications systems had stopped, indicated it continued flying for hours after it disappeared from its flight path from Kuala Lumpur to Beijing.įrom the time the signals took to reach the satellite and the angle of elevation, Inmarsat was able to provide two arcs, one north and one south that the aircraft could have taken.

The new findings led Malaysian Prime Minister Najib Razak to conclude today that the Boeing 777, which disappeared more than two weeks ago, crashed thousands of miles away in the southern Indian Ocean, killing all 239 people on board. London, March 24 (Reuters): Britain’s Inmarsat used a wave phenomenon discovered in the nineteenth century to analyse the seven pings its satellite picked up from Malaysia Airlines Flight MH370 to determine its final destination.

Relatives of passengers on Malaysia Airlines flight MH370 leave a Beijing hotel on Monday after being told that the plane had plunged into the southern Indian Ocean.